Road-grading machine.



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Beit known that I, CA of Minneapolis, Hennepin county, Minnesota,

have invented certain new and useful Im-k 1 and improve the road Av 1o l for the purpose designed.

proveniente` in Road-Grading Machines, of

vnvhich the following is a specification.

' The object of my invention is to simplify ding machinesv` in general use to the end t iat they can be more easily handled and will be more effective The invention consists generally in an iinproved center shiftA for the scraper mechtenista. f. i i .i Y

Further, the invention consists of-'an iniproved rear axle shift bv means of which the machine can be held to the work and can vat be readily adapted .for various conditions? Under which it kis; used.

y In the accompanying drawings, forming,r part of this eciication, Figure 1 is a plan view of a roa ading machine, embodying my invention, ig. 2 is a side f 'ilelmtion of the same, Fig. 3 1s a. rear view, illustrating the rear axle shift, Fig. 4 is a bottom view' of the saine F' 5 is a detail planview of the rear axle 1i Fig. 6 is a detail View of the center slnft, ig. a sectional View, illustrating the center shift mechanism taken en a section line at right angles substantially to Fig. 6, Fig. 8 is a to view, partially in section of the center shi is a detail, sectional View, showing a portion of the rear axle shift.

In the` drawing, 2 represents the `raised ,forward portion of the main frame having forward ca l wheels 3 and 4 isa rear portion of said of and having a rear .axle 5 and carrying` wheels 6.k Braces 7 connect the frames 2 and 4.

8 is a secondar frame, similar to those Y v usually employed in mechanism of this kind,

' idly connect the rin 10 with a scraper 1.3.

i' The ring 10 is revo ved by the vengagement of a pirnon 14 on the shaft 15 with the teeth of the gear ring 11. Uprightbrackets 16 are mounted on the frame of the machine i A v on each side of said turntable and .have bearings for the shafts 17, which have outwardly `,turned ends 18. Brackets 19 `are secured GAF-L o. wenn, or marcus, MINNESOTA.

y nenn-emma namur; ,i

'fa Fig. e'

ame below -the level therethe pinion and rack'bar through the slide to the secondary frame and have their outer ends pivotally-connceted with the ends 18 by rods 20. The shafts 17 `have worm vistA wheels 21 thereon, which are engaged by screwsr 22 provided withjoperating wheels 23.. vThe brackets 16. are connected across lthe machine by a bar 24 having a series of f,l yteeth 25 thereon. A sliding carria e 2G is a t mounted on said bar andv a. rod 27 pivotally connects said carriage with a bracket 19 on one side of the machine. ,i f v 28 is a shifter castingliaving au eye 29 therein to receive the teeth 25, the ends of the casting dropping into the recesses be,- ltween the teeth, asindicated 1n Fig. 8. This casting has studs 30 and 31 thereon, the latter of which has a squared end to lit a socket in a coupling 32 `carried by a shaft 33, having an operating wheel .34, The l' studs 30 and 31 have bearin 26 and are vertically in the carrier mova le in slots 35 vtherein and said casting is normally held in engagement, with the teeth byy a-spring 3G. ,y

When the casting .is revolved, it will roll on the bar, the end of the. casting forming `4 yso` bar when a twistingstrain is applied to the n This movementof the. shifter casting back and forth on the bar' will transnit. movement through the rod a pivot, and travels from side to side of the studs 30 and 3.1.

27 to shift the scraper blade lengthwise from side to side of the machine. lohave found this to be an extremely simple and effective 5. A stra-p 39 is secure to the under side of the frame 4 and a bar 40l is provided with aliooked end 41, which is pivotally connectedV with' the lower end of a post 51, here-l plat`forin38 thereon sup orted by the axle inafter referred to. Thisbar has cross arms 42 and 43. thereon, carrying anti-friction` rollers 44, which bear on the sides ofthe axle. A link 45 connects one end of the bar 40 with a slide 46 that is movable back and forthvon one ofthe rails of the frame 4. A

rack bar 47 is secured to the slide- 46 and a l i st 48 has a pinion 49 in engagementwith the teeth of said bar.v Whenthe ost 48 is Y revolved,power willv be transniitte through in slots therein forming movement.

h the linlrs 45 Athe bar i@ to oscillate the'ax e and set it atan s angle to the direction of movement, or ob,-K I liquely .t machine. On the otherV side of the machine,- jr n rack bar 49' isl provided, secured to the with respect to the frame of the axle and meshing with the pinion 50 on a post 51, the revolution of which will shift the rear axle from side `to side and permi its adjustment with-:respect tothe-voili` This will be independent of the oscillating 'adjustment of the axle by means of thefrack bar 4'? and its connections. These two forms ofshift are simple and inexpensive in conpose designed. e 1 I have shown this invention in connection with a road grading machine, but do not Wish-toconfine myself to this application, as the invention is capable of use with other fypes of machines intended for the same or or other purposes. A

,-, I claimas my inventionz- 1 1, The combination, with a frame having carrying wheels, of a secondary frame ivotally connected with said first named rame, meansfor raising'andlowering said secondary frame, a transversely arran ed toothed bar,v a carrier slidably mounted iereon and havide ways, a shifter having studs movab e .Within said slots toward and from said bar,-'said shifter bein capable of a ro ling movement on said bar mend to end thereof and ada ted to move said carrier thereon with a step y step 2. The combination, with 'a 'wheeled nected therewith, means for shifting said c secondaryY frame from side to side, said shifting means including a toothed bar, aY

carrier slidably mounted thereon and having guide ways, a rocking shifter having studs tting within said guide ways and movable therein toward and from said bar, means for yieldingly kholding said shifter in 'engagement with said bar, andxsaid shifter beiiig l capable of an end over-end movement on the teeth of said har, substantially as described. f

3. The combination, with a frame having carryin wheels, of a seconda frameV pivoted tereon, a transverse y arranged toothed bar, a carrier sldabl mounted thereon and` pivotally connecte with said secondary frame, a rocking shifter having studs slidably mountedin said carrier toward and from said bar, said shifter havin a pin vertically slidableV in said carrier, an a spring carried by said pin and yieldingly holding said shifter in engagementwith the l' i wah-0f ssaber.

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.4. In a inachine of theu'classideseribed, a

center shifting device, comprising a toothed ,senese 'I struction and at the same time, are strong 1 and durable and very effective for the purside, said shiftin ment with the teet said axle, a bar pivotally connected at one to said bar an Ahaving' guide wheels con` bar, a carrierslidable thereon and having vertical slots. a shifter havingstuds jourj naled in said slots and vertically movabletherein, means for rockino' said shifter to rll it on said bar from side-to side,

The combination, with a frame, of a .pivoted secondary frame, a toothed cross i par, a. carrier shdable thereon kand ivotlolly connected 1with said secondary D rame, a ,rocl'nmT shlfter incloscd within said car nerand having studs .shdable 1n guide ways s 1 provided 1n said carrier, said shifter being substantially rectangular m form and pro t vided with an eye to receive a tooth of said s bar, and adapted lto be moved end over end on said bar, said shifter risingin the guidev ways in said carrier to permit such shifting movement, substantially as described.

6. The combination, with n main frame Y having carrying wheels, of a pivoted sec g5 l onda'ry frame, a cross bar, av carrier slidable thereon and pivotall connected with said secondary frame, sai carrierhaving vertical guide ways therein, a shifter having A v studsv slidable m said guide ways and adapt- 9o ed to engaffe seid bar, a pin carried by said "shifter and slidable in said carrier, and a spring coiled about said pin and normally )gelding said shiterin engagement with said ar. f Y v .7. In a grading machine, the combination, with a frame having carrying wheels, of a secondary frame pivoted t ereon, a scraper carried by said secondary frame, means for shifting said secondary frame from side to G means includinv a toothed bar', a` carrier sl'ldably mounted thereon and ivotally connectedl with said secondary rrame, mid carrier having guide ways a f shifter, including a rectangular Ipart having 1 05 p an e"e to receive a too*l o sai.. har, .ids slida le in the guide ways of said carrier, one of said studs having an end adapted to f receive an operating means, and means inf eluded Within said carrier and yieldingly 110V holding said shifter in engagement with the rteeth of saidbar. v l

v8. The combination, with a `toothed bar,of 4a carrier slidably mounted thereon having vertice v ider wa s therein. a shifter having studs fitting within said guide wa s and vertically movable therein', means or rocking' s" nu u ` said shifter to move said carrier, and means yieldingly holdin said shifter in engageof said bar.

9. The combination, with a frame, of an axle having carrying wheels, a strap secured to saidframe'transversely with respect to end to said stra arms secured transversely tacting with said axle, a slide mounted on said frame and pivotally connected with said' barsa1d'shde moving in a direction at right.

` angles substantially to the` normal position 13 I 10.. The combination, with a frame, of an axle having caiiyinff whces, a. bar having a hooked end pivotalliy connected with saidv frame, guide wheels carried by said bar and contacting with Asaid-axle, a slide mounted on` said yframe and having a pivotal' connection with saidl bai', said slide moving in a v. direction at right angles substantialiy tothe l-Qnoi-inal position of said bar,and means for y reciprocating said slide to osciliate said ba and change thcangie mile.

1I. The coniinzition, with a frame, of an axle havin` `carrying wheels, a barhaving a -ffhooked en iivotaliy connected with said Y frame, said ar extending transversely of Y said rameparaiiei with said ax1e,ineans for movin said bar and franie back and forth on sai ax1e, a slide arranged to reciprocate Y* at an angle to saidaxle and having 3 PV" otalv connection with said har, and means for i operating said slide. 1 '25 vv.gnatioinwith 'a frame having carryingwheels, of a secondary frame, a turn table frame carried by saidA secondary frame,l a ring n .12. In a roadr grading machine the combiseated said turn table frame and ha 0' a gear ring, a scraper connected with sai incense ring, means Vfor Araising and idirering sia-idA .ring and secondary frame, a toothed, transmounted on said bar and having slots there- -r rocking ring, a scraper carried by said ring, means e for raising and lowering said ring and secveisely arranged" bar, 'a carriage siidabiy in, a yshifter having stand-s journaled in said 35 slots-'and movabiethereim-and means for said shifter-to roll it on said bar i'onisideto side. 'f i Y i 13. In a road grading machine the coinbinatioinwith a fi'anie having carryingwheels, t0 A of a secondary frame, a turn tab1e,`a ring seated in said turn table .and having a gear oiidary frame, a toothed transversely ar-45 I ranged bai', a carrier slidably mounted on c said bai' and having guide Ways therein a shifter having studs fitting Within said guide ways and movable therein, means mounted in said carrier and yieidingly holding said 50- .v shifter in engagement with the teeth of said bar, and means 'for rocking said shifter end 'over end on said bar, for the purpose speci- Y fied.v 7. Y l 'c In witness whereof, I have hereunto set 55 my hand this 2nd day of June 1909. l I CARL O. WOLD.r 1 `Witnessesz f J.M.SUm.ivN,

J. A. BYiNGmN. 

